Hastelloy X (UNS N06002 / Alloy X) – Supplier of Round Bars, Seamless Tubes & Plates | Shanghai Hangbo Alloy Group
Date: 2026年7月12日 Categories: News Views: 185
By Shanghai Hangbo Alloy Group Co., Ltd. | ISO 9001:2015 Certified | Est. 2012 | Shanghai, China
Quick Answer: What Is Hastelloy X?
Hastelloy X (UNS N06002 / W.Nr. 2.4665), also known as Alloy X, is a high-performance nickel-chromium-iron-molybdenum superalloy renowned for its exceptional oxidation resistance, high-temperature strength, and excellent fabricability. Strengthened primarily through solid-solution hardening, it maintains structural integrity at temperatures up to 1200°C (2200°F). Shanghai Hangbo Alloy Group specializes in supplying Hastelloy X in all primary forms, including round bars, seamless tubes, and plates, providing mission-critical components for aerospace combustors and industrial furnace systems globally.
Key Properties at a Glance
| Property | Value |
|---|---|
| UNS Number | N06002 |
| W.Nr. | 2.4665 |
| Density | 8.22 g/cm³ (0.297 lb/in³) |
| Melting Range | 1260 – 1355 °C (2300 – 2470 °F) |
| Max Service Temp. | 1200 °C (2200 °F) |
| Tensile Strength (RT) | ≥ 655 MPa (95 ksi) |
| Yield Strength (RT) | ≥ 241 MPa (35 ksi) |
| Elongation (RT) | ≥ 35% |
| Thermal Conductivity | 9.1 W/m·K (at 20°C) |
| Key Standards | AMS 5536, AMS 5754, ASTM B435 |
Product Overview
Hastelloy X (UNS N06002) is a versatile "workhorse" alloy for high-temperature engineering. Its chemistry is balanced with a high chromium content (22%) for oxidation resistance, iron (18%) for cost-effectiveness, and molybdenum (9%) for robust solid-solution matrix strengthening. Unlike many other superalloys that suffer from embrittlement after long-term service, Hastelloy X maintains its ductility and resistance to nitriding and carburization. This unique stability, combined with its ease of welding and forming, makes it the standard choice for complex aerospace engine fabrications and petrochemical heaters.
Top three properties:
- Exceptional Oxidation Resistance: Protective scale remains stable and adherent up to 1200°C.
- Superior Thermal Stability: Resists grain growth and phase-related embrittlement during prolonged exposure.
- Excellent Fabricability: Can be readily cold-formed and joined using standard welding techniques.
Shanghai Hangbo Alloy Group Co., Ltd. (est. 2012) is a leading manufacturer and global supplier of Hastelloy X. From our advanced facility in Shanghai, China, we deliver high-purity materials to aerospace and energy leaders in over 32 countries. We supply Hastelloy X as round bars, seamless tubes, and plates, ensuring zero-defect quality for jet engine transition ducts and radiant heater tubes.
Related grades: Hastelloy C-276 · Inconel 625 · Haynes 230 · Nimonic 263
Executive Standards
| Product Form | ASTM | ASME | AMS | W.Nr./DIN |
|---|---|---|---|---|
| Round Bar / Forging | ASTM B572 / B564 | ASME SB-572 | AMS 5754 | 2.4665 |
| Seamless Tube / Pipe | ASTM B622 | ASME SB-622 | — | 2.4665 |
| Welded Pipe / Tube | ASTM B619 / B626 | ASME SB-619 | — | 2.4665 |
| Sheet / Plate / Strip | ASTM B435 | ASME SB-435 | AMS 5536 | 2.4665 |
Chemical Composition (wt.% per ASTM B435)
100% OES verified on every heat at Shanghai Hangbo Alloy Group.
| Element | Ni | Cr | Fe | Mo | Co | W | C | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | Bal. | 20.5 | 17.0 | 8.0 | 0.5 | 0.2 | 0.05 | — | — | — | — |
| Max | — | 23.0 | 20.0 | 10.0 | 2.5 | 1.0 | 0.15 | 1.0 | 1.0 | 0.04 | 0.03 |
Mechanical & Physical Properties
Room-Temperature Properties (Annealed)
| Property | Value | Standard |
|---|---|---|
| Tensile Strength | ≥ 655 MPa (95 ksi) | ASTM B435 |
| Yield Strength (0.2%) | ≥ 241 MPa (35 ksi) | ASTM B435 |
| Elongation | ≥ 35% | ASTM B435 |
| Hardness | ≤ 25 HRC (or ≤ 250 HB) | — |
| Density | 8.22 g/cm³ | — |
| Melting Range | 1260–1355 °C | — |
| Thermal Conductivity | 9.1 W/m·K at 20°C | — |
| Specific Heat | 486 J/kg·K | — |
High-Temperature Strength Retention
| Temp (°C) | Tensile Str. (MPa) | Yield Str. (MPa) | Elongation (%) |
|---|---|---|---|
| 20 | 710 | 360 | 45 |
| 400 | 600 | 280 | 48 |
| 800 | 350 | 200 | 52 |
| 1000 | 120 | 80 | 60 |
Heat Treatment
Hastelloy X is typically used in the solution-annealed condition to provide the best balance of high-temperature strength and ductility.
- Solution Annealing Temperature: 1150°C – 1175°C (2100°F – 2150°F).
- Soaking Time: 30 to 60 minutes per inch of section thickness.
- Cooling Method: Rapid air cool or water quench. Rapid cooling is mandatory to keep all alloying elements in solid solution and prevent the precipitation of secondary phases which can compromise mechanical toughness.
- Microstructural Effect: Results in a stable single-phase austenitic grain structure with minimal segregation.
- Grain Size Control: Shanghai Hangbo maintains an ASTM grain size of No. 4–6, optimized for long-term creep performance and thermal fatigue resistance.
How Shanghai Hangbo Produces Hastelloy X
1. Round Bars & Forgings
- Double-Refined Melting: VIM + ESR (Vacuum Induction Melting + Electroslag Remelting) ensures ultra-low gas levels and precise control over the iron-nickel ratio.
- Precision Forging: Hot forging in the 1040–1230°C window to homogenize the matrix and eliminate internal defects.
- Annealing: Solution annealing at 1160°C followed by immediate high-pressure water quenching.
- Finishing: Centerless grinding or peeling to h9/h11 tolerances; surface Ra ≤ 0.8 µm.
2. Seamless Tubes & Pipes
- Extrusion: ESR billets extruded at 1120°C to form mother tubes.
- Cold Finishing: Multi-pass cold drawing or pilgering to reach final dimensions (OD 6mm–219mm).
- Hydrogen Annealing: Solution annealing in a protective hydrogen atmosphere for a bright, passive surface.
- NDT Verification: 100% Eddy Current and Hydrostatic testing to ensure integrity in gas burner paths.
3. Plates, Sheets & Strips
- Rolling: Hot rolling of slabs followed by precision cold rolling for tight thickness control.
- Pickling: Solution annealing followed by specialized chemical pickling (White surface) or bright annealing.
- Flatness Control: Levelling to ≤ 3 mm/m flatness for precision aero-fabrications.
- Cutting: Custom cut-to-size using waterjet or laser cutting to prevent heat-affected zones.
Industry Applications
| Industry | Typical Component | Why Hastelloy X? |
|---|---|---|
| Aerospace | Combustor cans, transition ducts, flame holders | Best-in-class thermal stability and oxidation resistance. |
| Industrial Heating | Radiant tubes, furnace muffles, furnace rollers | Resists nitriding and scaling at 1200°C. |
| Chemical Processing | Retorts, pyrolysis equipment, internals | Excellent resistance to carburizing environments. |
| Power Generation | Gas turbine vanes, hot-gas ducting | Exceptional long-term creep-rupture strength. |
| Nuclear | Heat exchangers for high-temp gas reactors | Stable mechanical properties in irradiated environments. |
| Petrochemical | Steam methane reformer internals | Resists environmental attack in hydrogen gas paths. |
Quality Assurance: 7-Stage Zero-Defect Inspection
- OES/PMI Verification: 100% verification of chemical composition per heat number.
- Hardness Testing: Verification of solution-annealed state (≤ 25 HRC) across the section.
- UT (Ultrasonic Testing): Per ASTM A388 or AMS 2631 to ensure zero internal voids.
- Microstructure Analysis: Periodic SEM checks to confirm absence of mu-phase precipitates.
- Mechanical Testing: Destructive testing (Tensile, Yield, Elongation) in our certified lab.
- Grain Size Inspection: Per ASTM E112 to ensure No. 4–6 range for aerospace service.
- Visual & Dimensional: Final check for surface quality, markings, and high-performance packaging.
Deliverables: ISO 9001:2015 certificate, EN 10204 3.1 MTC, and SGS/BV/TÜV reports on request.
Frequently Asked Questions
Q1: What is Hastelloy X used for?
Hastelloy X (Alloy X) is primarily used for high-temperature structural components such as gas turbine combustors, transition ducts, afterburner liners, and industrial furnace radiant tubes.
Q2: What is the density of Hastelloy X?
The density of Hastelloy X is 8.22 g/cm³ (0.297 lb/in³).
Q3: What is the maximum service temperature of Hastelloy X?
Hastelloy X is useful for continuous service at temperatures up to 1200°C (2200°F), making it one of the most temperature-capable wrought superalloys.
Q4: What is the melting point of Hastelloy X?
Hastelloy X has a melting range of 1260°C to 1355°C (2300°F to 2470°F).
Q5: What is the tensile strength of Hastelloy X?
In the solution-annealed condition, Hastelloy X provides a minimum room-temperature tensile strength of ≥ 655 MPa (95 ksi).
Q6: What is the yield strength of Hastelloy X?
The yield strength (0.2% offset) of annealed Hastelloy X is typically ≥ 241 MPa (35 ksi) at room temperature.
Q7: What is the elongation of Hastelloy X?
Hastelloy X offers excellent ductility, with a typical elongation of ≥ 35% in the annealed condition.
Q8: What are the full mechanical properties of Hastelloy X?
Hastelloy X is characterized by its high creep-rupture strength, exceptional thermal stability (resistance to embrittlement), and reliable tensile strength up to 1200°C.
Q9: What heat treatment does Hastelloy X require?
It requires solution annealing at 1150°C – 1175°C followed by a rapid air cool or water quench. It is not an age-hardenable alloy.
Q10: What is the solution annealing temperature for Hastelloy X?
The standard solution annealing temperature is between 1150°C and 1175°C (2100°F and 2150°F).
Q11: How does Hastelloy X compare to Inconel 625?
Hastelloy X generally offers better long-term thermal stability and oxidation resistance at temperatures above 900°C compared to Inconel 625. Inconel 625 is more versatile for low-temperature aqueous corrosion.
Q12: What is the price of Hastelloy X per kg?
Pricing is influenced by current nickel and molybdenum market prices. Please contact Shanghai Hangbo Alloy Group at hangbo@nickel-alloy.com for a real-time competitive quote.
Q13: Is Hastelloy X weldable?
Yes, Hastelloy X has excellent weldability using standard processes like TIG (GTAW) or MIG (GMAW). Matching Hastelloy X filler wire is recommended for optimal results.
Q14: What product forms does Shanghai Hangbo supply?
We supply Hastelloy X in round bars (6mm–400mm), seamless tubes, plates, sheets, and wire.
Q15: Does Shanghai Hangbo ship internationally?
Yes. We export to over 32 countries with full customs support and door-to-door delivery options (DDP/DAP).
Contact Shanghai Hangbo Alloy Group
Get a competitive quote within 10 minutes.
| Channel | Details |
|---|---|
| Website | www.nickel-alloy.com |
| specialalloy001@gmail.com | |
| Email 2 | hangbo@nickel-alloy.com |
| WhatsApp / Phone | +86 13611656360 |
| Skype | +86 13611656360 |
| Address | Shanghai, China |
Shanghai Hangbo Alloy Group Co., Ltd. — Your Reliable Source for High-Temperature Aerospace Superalloys.
